JP7051383B2 - Double layer cosmetics - Google Patents

Description

The present invention relates to a non-rinse type two-layer cosmetic.

In conventional hair cosmetics, a technique is known in which an oil-soluble functional base and a hydrophilic functional base are used in combination at the same time to impart a hair feel and styling performance, but a stable emulsified state is known. In addition to the emulsified-type preparation of the above, a two-layer type preparation that is agitated and emulsified at the time of use is known (for example, Patent Documents 1 to 3).

Japanese Patent Application Laid-Open No. 2009-161508 Japanese Unexamined Patent Publication No. 2011-21000 Special Table 2016-535047 Gazette

The two-layer type formulation can improve the performance by being able to contain a large amount of oily component. However, the conventional two-layer formulation has a cloudy appearance when shaken to an emulsified state, which is the same even when each of the oil layer and the aqueous layer is a transparent formulation. rice field.

On the other hand, with the recent changes in the variety of consumer tastes, in addition to the performance of cosmetics, the aesthetic appearance is also required.

Therefore, the present invention relates to a two-layer cosmetic that has unprecedented high-quality aesthetics that ensure transparency in both a two-layer separated state and a mixed state, and that imparts a good feel to hair and skin. ..

The present inventors have found that by adopting a non-polar oil or a low-polar oil as an oil agent and coexisting water and a nonionic surfactant in a constant amount ratio, those satisfying the above requirements can be obtained. ..

The present invention is a two-layer type that contains components (a) to (c) and has a mass ratio (c) / (a) of component (c) to component (a) of 1.3 or more and 3.0 or less, and is not washed away. It provides cosmetics.
(a) Water of 20% by mass or less
(b) An oil that is liquid at 25 ° C and has an organic value of 280 or less.
(c) Nonionic surfactant with HLB 10 or higher

The two-layer cosmetic of the present invention has an unprecedented high-class aesthetic and a good feel that ensures transparency in both the two-layer separated state and the mixed state.

[Ingredient (a): water ]
The water content of the component (a) in the two-layer cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more from the viewpoint of improving the solubility of the hydrophilic functional base. It is more preferably 2% by mass or more, and from the viewpoint of obtaining a good feel, it is 20% by mass or less, preferably 17% by mass or less, more preferably 10% by mass or less, still more preferably 5% by mass. It is as follows.

[Component (b): Hydrocarbon oil that is liquid at 25 ° C and has an organic value of 280 or less]
In the present invention, a hydrocarbon oil which is liquid at 25 ° C. and has an organic value OV of 280 or less is used as the component (b). Here, the "organic value (inorganic value)" is an organic conceptual diagram (Akira Fujita, "Prediction of Organic Compounds and Organic Conceptual Diagram", Area of Chemistry VOL.11, No.10 (1957) 719-715). It is a value obtained based on. More specifically, in this organic conceptual diagram, the degree of physical properties of a compound mainly due to Van Der Waals force is defined as "organic".

The hydrocarbon oil having an organic value OV of 280 or less can be used alone or in combination of two or more. Examples of the hydrocarbon oil include light isoparaffins, light liquid isoparaffins, liquid isoparaffins, paraffin-based oils such as liquid paraffins , α-olefin oligomers and the like. Among these, at least one selected from light isoparaffin and hydrogenated polyisobutene is preferable, and hydrogenated polyisobutene is more preferable, from the viewpoint of improving the transparency and feel of the two-layer separated state and the mixed state.

The content of the component (b) in the two-layer cosmetic of the present invention is preferably 20% by mass or more from the viewpoint of improving the solubility of the oil-soluble functional base and obtaining a good feel. It is preferably 40% by mass or more, more preferably 50% by mass or more. Further, the upper limit of the content of the component (b) is the balance amount with respect to the total content of the other components. In particular, from the viewpoint of ease of manufacturing the two-layer cosmetic and the improvement of the stability of the obtained cosmetic, the content is preferably 98% by mass or less, more preferably 95% by mass or less, and further preferably 92% by mass or less.

[Component (c): Nonionic surfactant with HLB of 10 or more]
Specific examples of the component (c) include polyoxyalkylene alkyl ethers having an HLB of 10 or more, polyoxyalkylene alkenyl ethers, alkyl glyceryl ethers, alkyl polyglyceryl ethers, polyoxyalkylene glycol fatty acid esters, glycerin fatty acid esters, and polyglycerin fatty acid esters. , Polyoxyalkylene glycerin fatty acid ester, higher fatty acid sucrose ester, higher fatty acid mono or diethanolamide, polyoxyethylene hydrogenated castor oil, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene sorbit fatty acid ester, alkyl saccharide-based surfactant, alkyl Examples thereof include amine oxides and alkylamide amine oxides. Of these, a nonionic surfactant having an HLB of 10 or more, which is liquid at 25 ° C., is preferable, and at least one selected from a polyoxyalkylene glycol fatty acid ester, a polyoxyalkylene glycol fatty acid ester, and a polyoxyethylene sorbitan fatty acid ester is preferable. Species are preferred, and polyoxyalkylene glycerin fatty acid esters are more preferred. Specifically, at least one selected from PEG-12 laurate, PEG-20 sorbitan coconut, and coconut oil fatty acid PEG-7 glyceryl is preferable, and coconut oil fatty acid PEG-7 glyceryl is more preferable.

From the same viewpoint, the HLB of the nonionic surfactant of the component (c) is 10 or more, preferably 10.5 or more, preferably 18 or less, and more preferably 13.0 or less. Here, HLB (hydrophilic-lipophilic balance <Hydrophilic-Lypophilic Balance>) indicates the molecular weight of the hydrophilic group portion in the total molecular weight of the surfactant, and for nonionic surfactants, Griffin ( It is obtained by the formula of Griffin). The HLB of a mixed surfactant composed of two or more nonionic surfactants is obtained based on the following formula. The HLB of the mixed surfactant is the HLB value of each nonionic surfactant averaged by phase addition based on the blending ratio.

Mixed HLB = Σ (HLBx × Wx) / ΣWx
[HLBx indicates the HLB value of the nonionic surfactant X. Wx indicates the mass (g) of the nonionic surfactant X having a value of HLBx. ]

The content of the component (c) in the two-layer cosmetic of the present invention is preferably 0.5% by mass or more, more preferably 1% by mass or more, still more preferably 2 from the viewpoint of improving ease of mixing during use. It is preferably 40% by mass or less, more preferably 30% by mass or less, still more preferably 20% by mass or less, from the viewpoint of good feel.
In the present invention, when the two-layer hair cosmetics are mixed with each other by shaking the two-layer cosmetics before use, a transparent appearance is obtained. Ease of mixing during use means that the speed at which this becomes transparent is fast.

The two-layer cosmetic of the present invention can contain a surfactant other than the component (c). From the viewpoint of improving the transparency and feel of the two-layer separated state and the mixed state, the content of the other surfactant is preferably 10% by mass or less, more preferably 5% by mass or less, still more preferably 3% by mass or less. ..

The mass ratio (c) / (a) of the component (c) to the component (a) in the two-layer cosmetic of the present invention is 1.3 or more from the viewpoint of improving the transparency of the two-layer cosmetic before use. It is preferably 1.50 or more, more preferably 1.7 or more, still more preferably 1.75 or more, and from the viewpoint of transparency during use, it is 3.0 or less, preferably 2.5 or less, and more preferably 2.2 or less. , More preferably 2.0 or less, and even more preferably 1.96 or less. In the present invention, the transparency of the two-layer cosmetic before use means the transparency of the appearance of each layer in a stationary state (also referred to as separation) before shaking the two-layer cosmetic. do.

[Component (d): Highly polymerized silicone selected from dimethicone and dimethiconol with an average degree of polymerization of 1000 or more and 20000 or less]
In order to further improve the feel, the two-layer cosmetic of the present invention can contain a highly polymerized silicone having an average degree of polymerization of 1000 or more and 20000 or less selected from dimethicone and dimethiconol as the component (d). Specific examples of commercially available highly polymerized silicone products corresponding to component (d) include TSE200A (Momentive Performance Materials, Inc .; Highly Polymerized Dimethicon), SH200-1,000,000cs (Toray Dow Corning, Inc .; Highly Polymerized Dimethicon), and TSF451-100MA (Momentive Performance Materials; Highly Polymerized Dimethicon), BY11-026 (Toray Dow Corning; Diluted solution of highly polymerized Dimethicon with low viscosity silicone), KF9008 (Shinetsu Chemical Industry; Highly Polymerized Dimethicon) (Diluted solution with cyclic silicone), BY22-050A (Toray Dow Corning; anionic emulsion of highly polymerized dimethicone), BY22-060 (Toray Dow Corning; cationic emulsion of highly polymerized dimethicone diluted with low viscosity silicone) , BY22-020 (Tole Dow Corning; cationic emulsion of highly polymerized dimethicone diluted with light liquid isoparaffin), KM904 (Shinetsu Chemical Industry; cationic emulsion of highly polymerized dimethicone diluted with low viscosity silicone), DC1501 Fluid (Toray Dow Corning; diluted solution of highly polymerized dimethiconol with cyclic silicone), DC1503 Fluid (Toray Dow Corning; diluted solution of highly polymerized dimethiconol with low viscosity dimethiconol), X-21-5849 (Shinetsu Chemical Industry Co., Ltd.) X-21-5666 (Shinetsu Chemical Industry Co., Ltd .; diluted solution of highly polymerized dimethiconol with cyclic silicone), X-21-5613 (Shinetsu Chemical Industry Co., Ltd .; diluted solution of highly polymerized dimethiconol with low viscosity dimethiconol) And so on. Any of these components (d) can be used alone or in combination of two or more.

The content of the component (d) in the two-layer cosmetic of the present invention is preferably 0.05% by mass or more, more preferably 0.1% by mass or more, still more preferably 0.2% by mass or more, from the viewpoint of improving the feel. Further, from the viewpoint of suppressing stickiness and dusting of the cosmetic on the hair and skin, it is preferably 20% by mass or less, more preferably 10% by mass or less, still more preferably 8% by mass or less. In addition to the highly polymerized silicone which is the component (d), the above-mentioned commercial product may contain a component corresponding to the component (a) or the component (b) as a solvent or a dispersion medium. Therefore, when determining the contents of the components (a), (b) and (d), it is necessary to consider the content ratio of these components in the commercial product.

[Other ingredients]
In addition to the above ingredients, other ingredients usually used as raw materials for cosmetics can be added to the two-layer cosmetics of the present invention. Such components include organic acids such as lactic acid and malic acid; film-forming polymers, preservatives, chelating agents, stabilizers, antioxidants, vegetable extracts, crude drug extracts, protein hydrolysates, vitamins, etc. Examples thereof include colorants such as dyes, fragrances, ultraviolet absorbers, and pearlizing agents such as ethylene glycol difatty acid esters.

〔form〕
The two-layer cosmetic of the present invention can be used as both a hair cosmetic and a skin cosmetic. Here, the hair cosmetic means a cosmetic applied to the scalp and hair, and the skin cosmetic means a cosmetic applied to the hair and the skin excluding the scalp, preferably the face, body, and limbs. do. When the cosmetic of the present invention is applied, it is more preferable to use a two-layer hair cosmetic because it can suppress stickiness and have an excellent feel even though it contains an oil agent. The two-layer hair cosmetic is used without being washed away after being applied to the hair, and is preferably in the form of, for example, a non-washing type conditioning agent, hair styling agent, or the like.

Examples 1-12, Comparative Examples 1-6
The two-layer hair cosmetics shown in Tables 1 and 2 were prepared, and the transparency and feel at the time of separation and at the time of mixing were evaluated.

<Transparency at separation>
(1) 50 mL of the two-layer hair cosmetics shown in Tables 1 and 2 was transferred to a screw tube (Maruem screw tube No. 8) and allowed to stand for one day and night.
(2) The upper layer liquid and the lower layer liquid after standing were visually observed and evaluated according to the following criteria.

A: Colorless and transparent (Times New Roman 16-point letters can be recognized through the glass of the screw tube)
B: Slightly cloudy (Times New Roman 16-point letters can be seen through the glass of the screw tube)
C: Cloudy (Times New Roman 16-point characters cannot be confirmed through the glass of the screw tube)
D: Do not separate

<Transparency when mixed>
(1) The screw tube evaluated by the above method was vibrated and stirred by hand until the upper and lower layers could be uniformly mixed.
(2) After stirring, the mixed solution 30 seconds later was visually observed and evaluated according to the following criteria.

A: Colorless and transparent (Times New Roman 16-point letters can be recognized through the glass of the screw tube)
B: Slightly cloudy (Times New Roman 16-point letters can be seen through the glass of the screw tube)
C: Cloudy (Times New Roman 16-point characters cannot be confirmed through the glass of the screw tube)

<Tactile evaluation>
(1) Using straight hair of a Japanese woman who has not undergone chemical treatment, make a tress with a length of 20 cm and a weight of 3 g when dried.
(2) The two-layer hair cosmetics of Examples 1 to 12 prepared according to Table 1 were diluted 5-fold with water, and then the tress prepared in (1) had a bath ratio of 1: 0.5 (hair mass: agent). Apply by mass) and cover with wrap. It was allowed to stand at room temperature for 5 minutes. In Comparative Examples 1 to 6, since the transparency at the time of mixing could not be ensured, the feel evaluation was not performed.
(3) Install the hair tress downward and fix the dryer (weak warm air mode: 600W) so that the distance from the outlet of the dryer (Nobby NB3000 manufactured by Tescom) to the center of the hair of the hair tress is 45 cm. bottom. Then, the dryer was dried by passing the finger once every 4 seconds.
(4) The feel of the hair bundle of the hair sample for evaluation was evaluated by five specialized panelists in comparison with the untreated hair according to the following criteria, and the average score was calculated for each.
+1: Smoother than untreated hair 0: Almost equivalent to untreated hair -1: Somewhat sticky compared to untreated hair (no problem in actual use)

Claims (3)

A non-rinse type two-layer cosmetic containing the components (a) to (c) and having a mass ratio (c) / (a) of the component (c) to the component (a) of 1.3 or more and 3.0 or less.
(a) Water of 20% by mass or less
(b) Hydrocarbon oil that is liquid at 25 ° C and has an organic value of 280 or less.
(c) Nonionic surfactant with an HLB of 10 or greater The two-layer cosmetic product according to claim 1, wherein the component (c) is a nonionic surfactant that is liquid at 25 ° C. The two-layer hair cosmetic according to claim 1 or 2, further comprising the component (d).
(d) Highly polymerized silicone selected from dimethicone and dimethiconol with an average degree of polymerization of 1000 or more and 20000 or less